I am definitely interested in the new Diploma of Canine Myofunctional Therapy. How would this course differ from the current Cert. Canine Myofunctional Therapy? (topics covered and course duration - correspondence?).

that's a good question - I would be interested in reading the reply.
I did the certificate (and am now studying herbal medicine)
I've also done the nutrition for small animals - all with the aim of becoming a small animal naturopath but I didnt realise a diploma for CMT had been created.